Desktop oral irrigator



FIG. 1 is a bottom perspective view of a desktop oral irrigator showing our new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a front view thereof.

The broken lines in the drawings depict portions of the desktop oral irrigator that form no part of the claimed design. 

CLAIM The ornamental design for a desktop oral irrigator, as shown and described. 